Improvement in ash-sifters



NITED STATES PATENT OFFICE.

ISAAC DAVIS AND SULLIVAN S. DAVIS, OF SPRINGFIELD, MASS.

IMPROVEMENT IN ASH-SIFTERS.

Specification forming part of Letters Patent No. 186,120, dated January9, 1877; application filed August 2, 1876.

To all whom it may concern:

Be it known that we, ISAAC DAVIS and SULLIVAN S. DAVIS, of Springeld, inthe county ot' Hampden and State of Massachusetts, have invented certainnew and useful Improvements in Ash-Sifter; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others'skilled in the art to which it pertains tomake and use it, reference. being had to the accompanying drawings,which form part of this specification.

The nature of our invention consists in the construction and arrangementof a sifter for coal-as`nes, or other articles similarly separated, aswill be hereinafter more fully set forth.

In the annexed drawing, which fully illustrates our invention, Arepresents the outside box or case, which may be of any desireddimensions, and has in its upper part a rotating cylinder, B, made ofwire-cloth, and formed upon two heads, C C, of about fifteen inches.

in diameter, diverging from a true circle, forming an opening, c, bymeans of a lip, b, of about four inches. The opening a is about threeinches, and serves the double purpose of feeding and discharging thecoal. rIfhe heads G C of the cylinder are secured on a shaft, D, havingits bearings in the sides of the box A, and one end provided with acrank.

It will be seen th at when the sieve is turned to the right by means ofthe crank, and when the mouth a is at the bottom,'the outer projectionor lip b has sufficiently passed the perpendicular of the inner line orlip b as to prevent the coal from discharging until the sifting iscompleted; then, by reversing the motion of the sieve or cylinder, thedischarge will take place, and the coal falls upon an inclined chute, G,and is caught in a hed or box placed for its reception. The chute G issuspended by means of pivoted arms or swinging hinges e e, and is, bymeans of a rod, H,

drawn back to its position as a chute. Immediately after the coal issifted and discharged the rod is pushed forward, which moves the chute Gforward and swings it upward to its position as a door, as shown at f.

When the work of sifting begins, a door, I, at the top of the case A. isopened and the ashes are put into the cylinder at a. The lid I is thenclosed and the cylinder turned slowly to the right from three to sixrevolutions or more, which completes the sifting. By means of the rod Hthe door G is now drawn back in position as a chute, and the cylinder isthen turned backward slowly, discharging the coal through the opening a,and depositing it in the hod or other receptacle instantaneously. Thisdone, the chute is immediately pushed forward by means ofthe rod H,entirely closing the box, and thus avoiding all dust.

At the back of the box is a door, J, for taking out ashes.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. The door or chute G, suspended by means of pivoted arms or swinginghinges e e, and operated by means of the rod H to form either a door orchute., substantially as herein set forth.

2. The combination of the box or case A, having lid I and door J, therotating cylinder B, with lips b b and opening a, and the combinedswinging door and chute G, substantially as and for the purposes hereinset forth.

In testimony that we claim the foregoing we have hereunto set our handsthis 18th day of July, 1876.

ISAAC DAVIS. SULLIVAN S. DAVIS.

Witnesses:

JOHN P. WALL, M. T. FOLEY, J. P. WHALEN.

